Diamancel foot files are famously the toughest in the business, used in all the Bliss Spas worldwide, they are highly rated by professionals like Charles Worthington. The Canadian brand was founded in 1994 by Ginette Godbout, a beauty pro with over 25 years' experience. They're made with real diamond dust - the hardest, most abrasive stone around - so you can be sure they'll slough off the toughest calluses.